... , SWAGE NIPPLE, BULL PLUG, REDUCER INSERT, PIPE NIPPLE ETC.SOCKET-WELD OR THREADED (NPT OR PT TYPE.)2. SIZE :NPS 1/8 ... , F304L, F316, F316L, F304H, F316H, F317L,F321, F11, F22, F91).SIZE OF RAW MATERIAL: DIA. 19-85MM ROUND BAR.5. MARKING ... NO. B16(BELONG TO ANSI B16. 11 PRODUCT),PRESSURE AND SIZE.6. FINISH:GALVANIZED OR BLACK.(CARBON),PICKLED(STAINLESS).7.PACKING ...